George Carlin

Yes. but the panels would be covered on sand constantly, not to mention the distance for distribution.

Those are concerns; the dust/sand issue could be mitigated by putting the farm on the west end of the Sahara and planning ahead for track-mounted machines that use compressed air to blast the panels clean but there's still transmission of power to deal with....considering that the average high-voltage line is around four inches thick, it'd definitely take a fairly hefty cable to carry the load across oceans/continents. Totally doable, though.

Oh, also, 115.6K square miles is only slightly larger than Arizona so if Morocco, Mauritania, Algeria and Mali could come to some sort of amicable agreement, concerning their four-corners-ish border area....